Using Electrolysis to Extract Metals (AQA GCSE Chemistry Combined Science): Flashcards

Too reactive for carbon reduction

Bauxite

$Al_2O_3$ (aluminium oxide)

Lowers melting point of bauxite

Graphite

$Al^{3+}$ gains electrons (reduction)

$Al^{3+} + 3e^- \rightarrow Al(l)$

Molten aluminium

$O^{2-}$ loses electrons (oxidation)

$2O^{2-} \rightarrow O_2(g) + 4e^-$

Oxygen gas

Carbon dioxide ($CO_2$)

Molten

Bottom (denser than mixture)